Spin-off from bug 461000: We've removed the form manager documentation, but we should add a few lines explaining what kind of information we capture and how we handle form autocomplete.
The form manager documentation was under Using Privacy Features but I think the new form autocomplete documentation should better be put under Browsing the Web since it's a much broader approach (affects all single-line text fields, whether privacy is involved or not). The existing subsections hardly fit, though. Maybe a new subsection, e.g. Using Forms, should be introduced. Topics could range from autocomplete to login and password management to privacy concerns (secure form submission etc.).
Firefox has documentation on this at http://support.mozilla.com/en-US/kb/Form+autocomplete?bl=n&s=autocomplete
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